Where once there was a 7,000-foot-tall mountain, there now is a crater 3,000 feet deep. With a caribou (Rangifer tarandus) running across it in this instance.

Aniakchak National Monument and Preserve is one of the most remote parks in the National Park System. Located far north in Alaska, the park's present-day landscape was created about 3,500 years ago when a volcano erupted. The blast turned what had been a 7,00o-foot-tall mountain into a crater that's about six miles wide.

Ever wonder what the most visited parks in the system are? How about least visited? The NPS office of statistics answers this question once a year with an ordered, ranked table cataloging recreation visits to each of the NPS managed units across the USA. So, what is the most visited park? Read on for the answer.